Class: Wongi::Engine::DSL::Clause::Neg

Inherits:

Has

• Object
• Struct
• Has
• Wongi::Engine::DSL::Clause::Neg

Defined in:

lib/wongi-engine/dsl/clause/fact.rb

Instance Attribute Summary

Attributes inherited from Has

#object, #predicate, #subject

Instance Method Summary

• #compile(context) ⇒ Object
• #inspect ⇒ Object

Methods inherited from Has

#initialize

Methods included from CoreExt

included

Constructor Details

This class inherits a constructor from Wongi::Engine::DSL::Clause::Has

Instance Method Details

#compile(context) ⇒ Object

Raises:

• (DefinitionError)

# File 'lib/wongi-engine/dsl/clause/fact.rb', line 45

def compile(context)
  tests, assignment = parse_variables(context)
  raise DefinitionError, "Negative matches may not introduce new variables: #{assignment.variables}" unless assignment.root?

  context.tap { |c| c.neg_node(self, tests) }
end

#inspect ⇒ Object

# File 'lib/wongi-engine/dsl/clause/fact.rb', line 52

def inspect
  "<-#{subject.inspect} #{predicate.inspect} #{object.inspect}>"
end